chore: bump postcss in /examples/openfeature_react/react-app (#3092)

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.1 to 8.5.2.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.1...8.5.2)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: dependabot[bot]

examples/openfeature_react/react-app/package-lock.json

@@ -27,7 +27,7 @@
     "eslint": "^9.20.0",
     "eslint-plugin-react-hooks": "^5.1.0",
     "eslint-plugin-react-refresh": "^0.4.19",
-    "postcss": "^8.5.1",
+    "postcss": "^8.5.2",
     "tailwindcss": "^4.0.5",
     "typescript": "^5.7.3",
     "vite": "^6.1.0"